/*
 * Copyright 2015-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.amqp.rabbit.test;

import org.hamcrest.Description;
import org.hamcrest.DiagnosingMatcher;
import org.hamcrest.Matcher;

/**
 * @author Gary Russell
 * @since 1.6
 *
 */
public final class RabbitMatchers {

	private RabbitMatchers() {
		super();
	}

	public static Matcher<String> matchesRegex(String pattern) {
		return new RegexMatcher(pattern);
	}

	private final static class RegexMatcher extends DiagnosingMatcher<String> {

		private final String pattern;

		private RegexMatcher(String pattern) {
			this.pattern = pattern;
		}

		@Override
		public void describeTo(Description description) {
			description.appendText("the pattern to match ").appendText(this.pattern);
		}

		@Override
		protected boolean matches(Object item, Description mismatchDescription) {
			String result = (String) item;
			boolean matches = result.matches(this.pattern);
			if (!matches) {
				mismatchDescription.appendText("is ").appendText(result);
			}
			return matches;
		}

	}

}
